For creating/editing new bodies of water with the current beta update of VR Sportfishing there are some new parameters to include in your *.lak files:

// Water type: Use one of the following values:// pond, small_lake, medium_lake, large_lake, stream, medium_river, larger_riverwater_type=medium_river

// Maximum water speed of a river, in feet per second.max_current=6.0

// Do you want NPC boaters on the water?npcs_allowed=no

// Do you want players to be able to walk and fish from shore? Saying yes// eliminates the dock fishing option.shore_fishing_allowed=yes

// Do you want players to be able to fish from boats?boat_fishing_allowed=yes

// Do you want the game to automatically add trees & plants? If you're adding// objects with the new system you should say "no" to the auto vegetation.auto_vegetation=no

// Average water temperature - Rivers and streams are often colder than still// waters the same size would be, due to cold springs, dam discharges, etc.// Setting the ave temp to 50 and the adjustment percentage to 60 is like mixing// 6 parts 50 degree water with 4 parts of water at the temperature that still// water would be at that time and place.ave_temp=50temp_adjust_percentage=60